There's an interesting project strated over on eyeOS.org - a content management system that is styled with an OS look and feel - created with the help of PHP.

EyeOS is a free, cross-platform Personal Content Manager System based upon the style of a Desktop Operating System. The base package includes the whole Operating System structure and ten apps, as a Calendar, a File Manager, a Text Editor, an Internal Messenger, a Browser and a Calculator.

EyeOS's is thought to provide a complete, scalable and free (GPL Licensed) Organization and Work System. It's scalable, so everyone can port an existing PHP app to EyeOS and create a meta-package for installing it.

Taking a look at the demo, it's an interesting concept, but I'd love to see it with some apps that tie directly into other well-used PHP-driven softwares (such as a Wordpress module, or a del.icio.us link manager) built directly in to give it more of a "overall management" feel.

You can check out the demo here...